When the day of Pentecost had come, they were all together in one place. And suddenly a noise like a violent rushing wind came from heaven, and it filled the whole house where they were sitting. And tongues that looked like fire appeared to them, distributing themselves, and a tongue rested on each one of them. And they were all filled with the Holy Spirit and began to speak with different tongues, as the Spirit was giving them the ability to speak out. Acts 2: 1-4 They were being baptized by the Spirit of Truth and by Fire.
Now staying in Jerusalem there were devout Jews from every nation under heaven. At this sound, a large crowd of them gathered, and they were bewildered because each one heard them speaking in his own language. They were astounded and asked in amazement, “Are not all these men who are speaking Galileans? How is it then that each of us hears them in his own native language? Parthians, Medes, and Elamites, residents of Mesopotamia, Judea, and Cappadocia, Pontus and Asia, Phrygia and Pamphylia, Egypt and the districts of Libya around Cyrene, visitors from Rome, both Jews and proselytes, Cretans and Arabs—we hear them speaking in our own languages about the mighty deeds of God.”

They were all astounded and perplexed, and they said to one another, “What does all this mean?” However, others said mockingly, “They are filled with new wine.”

Peter Preaches in the Name of the Twelve. Then Peter stood up with the Eleven and proclaimed to them in a loud voice, “Men of Judea and all you who live in Jerusalem, let this be known to you, and listen carefully to my words. These men are not drunk, as you suppose. It is only nine o’clock in the morning. Rather, this is what was revealed through the prophet Joel:

‘It will come to pass in the last days, God declares,
that I will pour out my Spirit on all flesh.
Your sons and your daughters shall prophesy;
your young men shall see visions,
and your old men shall dream dreams.
Indeed, even upon my servants and my handmaids
I shall pour out my Spirit in those days,
and they shall prophesy.
I will show portents in the sky above
and signs on the earth below:
blood and fire and billows of smoke.
The sun will be turned into darkness
and the moon to blood
before the day of the Lord comes,
that great and glorious day.
Then it will come to pass
that everyone who calls on the name of the Lord will be saved.’

“Men of Israel, hear these words. Jesus of Nazareth was a man commended to you by God by means of miracles and portents and signs that God worked through him, as you yourselves know. By the set plan and foreknowledge of God, he was handed over into the hands of lawless men. Crucifying him, you killed him. However, God raised him up, releasing him from the pangs of death, because it was impossible for him to be held in its power. For David says of him:

‘I saw the Lord always before me;
with him at my right hand I shall not be shaken.
Therefore, my heart rejoiced and my tongue exulted;
moreover, my flesh will live in hope.
For you will not abandon me to the netherworld
or allow your holy one to suffer corruption.
You have made known to me the way of life;
you will fill me with joy in your presence.’

“Brethren, I can say to you boldly that our ancestor David both died and was buried, and his tomb is in our midst to this very day. But since he was a prophet and knew that God had sworn an oath to him that one of his descendants would sit on his throne, he foresaw and spoke of the resurrection of the Christ, saying that he was not abandoned to the netherworld and that his flesh did not suffer corruption.

“God raised this Jesus to life. Of that we are all witnesses. Exalted at God’s right hand, he received from the Father the promise of the Holy Spirit and has poured out what you now see and hear. For David did not ascend to heaven, and yet he said, ‘The Lord said to my Lord, “Sit at my right hand until I make your enemies your footstool.” ’

“Therefore, let the whole house of Israel know with complete certitude that God has made this Jesus whom you crucified both Lord and Christ.”

When they heard this, they were cut to the heart and said to Peter and to the other apostles, “What are we to do, brethren?” Peter answered, “Repent, and be baptized, every one of you, in the name of Jesus Christ so that your sins may be forgiven, and you will receive the gift of the Holy Spirit. For the promise that was made is for you, for your children, and for all those who are far away, for all those whom the Lord our God will call.”

He offered further testimony with many other arguments as he exhorted them, “Save yourselves from this corrupt generation.” Those who accepted his message were baptized, and on that day about three thousand people were added to their number. They devoted themselves to the teaching of the apostles and to the communal fellowship, to the breaking of bread and to prayers.

A sense of awe was felt by all for many wonders and signs were performed by the apostles. All the believers were together and owned everything in common. They would sell their property and possessions and distribute the proceeds to all according to what each one needed. Every day, united in spirit, they would assemble together in the temple. They would break bread in their homes and share their food with joyful and generous hearts as they praised God, and they were regarded with favor by all the people. And day by day the Lord added to those who were being saved.